The BLACK+DECKER LCS1240 12″ 40V Cordless Chainsaw features a 40V MAX Lithium Ion Battery for longer runtime and overall life – it stays charged up to 5x longer. It has a 12″ Oregon low-kickback bar and chain which provides smooth and fast cuts. The tool-free chain tensioning allows for quick and easy chain adjustments . and it also features a lightweight design for ease of use and maneuverability. The automatic oiling system ensures constant bar and chain lubrication . and the wrap around bale handle provides increased control and comfort.